|Abacus ||4293 ||31 yes||19 yes ||19 yes||26 yes||13 yes||19 yes||24 yes||24 yes|| Multiple forms of Abacus that work and teach math
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|Abacus ||4293 ||31 yes||19 yes ||19 yes||26 yes||32 ASLO '''no''' *; 13 yes||19 yes||24 yes||24 yes|| Multiple forms of Abacus that work and teach math *failed to start